ES2170424T3 - PNEUMATIC OR HYDRAULIC SERVOMOTOR WITH DISCONNECTION DEVICE. - Google Patents

PNEUMATIC OR HYDRAULIC SERVOMOTOR WITH DISCONNECTION DEVICE.

Info

Publication number
ES2170424T3
ES2170424T3 ES97951167T ES97951167T ES2170424T3 ES 2170424 T3 ES2170424 T3 ES 2170424T3 ES 97951167 T ES97951167 T ES 97951167T ES 97951167 T ES97951167 T ES 97951167T ES 2170424 T3 ES2170424 T3 ES 2170424T3
Authority
ES
Spain
Prior art keywords
piston
pressure
crazy
work
pistons
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
ES97951167T
Other languages
Spanish (es)
Inventor
Jens-Uwe Hafermalz
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ZF Friedrichshafen AG
Original Assignee
ZF Friedrichshafen AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ZF Friedrichshafen AG filed Critical ZF Friedrichshafen AG
Application granted granted Critical
Publication of ES2170424T3 publication Critical patent/ES2170424T3/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B15/00—Fluid-actuated devices for displacing a member from one position to another; Gearing associated therewith
    • F15B15/20—Other details, e.g. assembly with regulating devices
    • F15B15/22—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke
    • F15B15/225—Other details, e.g. assembly with regulating devices for accelerating or decelerating the stroke with valve stems operated by contact with the piston end face or with the cylinder wall
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/061—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle provided with effort, steering lock, or end-of-stroke limiters
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62D—MOTOR VEHICLES; TRAILERS
    • B62D5/00—Power-assisted or power-driven steering
    • B62D5/06—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle
    • B62D5/10—Power-assisted or power-driven steering fluid, i.e. using a pressurised fluid for most or all the force required for steering a vehicle characterised by type of power unit
    • B62D5/12—Piston and cylinder

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Steering Mechanism (AREA)
  • Actuator (AREA)

Abstract

LA INVENCION SE REFIERE A UN DISPOSITIVO DE DESCONEXION HIDRAULICA EN LAS POSICIONES FINALES DE UN SERVOCILINDRO. LOS DISPOSITIVOS DE DESCONEXION O CIERRE DE ESTE TIPO ESTAN DISEÑADOS PARA IMPEDIR EL CONTACTO DURO DIRECTO ENTRE EL PISTON EN FUNCIONAMIENTO (31) Y LOS TOPES LIMITADORES (47, 48) A LA PRESION DE TRABAJO, Y PARA PERMITIR LA RETIRADA DE LAS POSICIONES FINALES CON ASISTENCIA HIDRAULICA. LA INVENCION SE CARACTERIZA PORQUE UNOS PISTONES LOCOS (32, 33), CON UNA POSIBILIDAD LIMITADA DE DESPLAZAMIENTO, SE ENCUENTRAN SITUADOS SOBRE EL PISTON DE TRABAJO (31). LOS PISTONES LOCOS (32, 33) ACTUAN COMO CIERRE, ADAPTANDOSE FIRMEMENTE CONTRA LOS BORDES DE SELLADO (34, 35) DEL PISTON DE TRABAJO. LOS BORDES DE CIERRE (34, 35) CONTROLAN UN CANAL DE DERIVACION (36) SITUADO EN EL PISTON DE TRABAJO (31). SE INSERTA UN MUELLE (41) ENTRE LOS PISTONES LOCOS (32, 33), EN UNA CAMARA (40) QUE PUEDE ESTAR A PRESION. CUANDO EL PISTON DE TRABAJO (31) SE PONE EN CONTACTO, POR EJEMPLO, CON EL TOPE LIMITE (48)DEL MANGUITO (43), EL COLLARIN (45) SEPARA UN PISTON LOCO (33) DEL BORDE DE CIERRE (35). LA UNION CON LA CAMARA (40) OCURRE A TRAVES DEL CANAL DE DERIVACION (36), CON LO QUE LA PRESION DE TRABAJO EMPUJA AL PISTON LOCO (32) DE NUEVO CONTRA EL MUELLE (41), ALEJANDOLO DE SU BORDE DE CIERRE (34). LA PRESION DE TRABAJO PUEDE ENTONCES CAER ENTRE LA CAMARA A PRESION (37) Y LA CAMARA A PRESION (38) HASTA QUE EL MUELLE (41) VUELVE A SELLAR EL PISTON LOCO (33) CONTRA EL BORDE DE CIERRE (34). LA PRESION QUE SE REGULA ASI EN LA CAMARA DE PRESION (37) SOSTIENE EL PISTON DE TRABAJO (31), JUNTO CON EL PISTON LOCO (32, 33) EN LA POSICION FINAL. NO OBSTANTE, LA PRESION ASI AJUSTADA SE ENCUENTRA POR DEBAJO DE SU VALOR MAXIMO.THE INVENTION REFERS TO A HYDRAULIC DISCONNECTION DEVICE IN THE FINAL POSITIONS OF A SERVO CYLINDER. THE DISCONNECTION OR CLOSURE DEVICES OF THIS TYPE ARE DESIGNED TO PREVENT DIRECT HARD CONTACT BETWEEN THE OPERATING PISTON (31) AND THE LIMITING TOPES (47, 48) TO THE WORKING PRESSURE, AND TO ALLOW THE REMOVAL OF THE FINAL POSITIONS WITH HYDRAULIC ASSISTANCE THE INVENTION IS CHARACTERIZED BECAUSE FOLLOWING PISTONS (32, 33), WITH A LIMITED POSSIBILITY OF DISPLACEMENT, ARE FOUND SITUATED ON THE WORK PISTON (31). THE CRAZY PISTONS (32, 33) ACT AS CLOSURE, ADAPTING FIRST AGAINST THE SEALING EDGES (34, 35) OF THE WORK PISTON. THE CLOSING EDGES (34, 35) CONTROL A DERIVATION CHANNEL (36) SITUATED ON THE WORK PISTON (31). A SPRING (41) IS INSERTED BETWEEN THE CRAZY PISTONS (32, 33), IN A CAMERA (40) THAT CAN BE PRESSED. WHEN THE WORK PISTON (31) IS CONTACTED, FOR EXAMPLE, WITH THE LIMIT BUMPER (48) OF THE HOSE (43), THE COLLAR (45) SEPARATES A CRAZY PISTON (33) FROM THE CLOSING EDGE (35). THE UNION WITH THE CHAMBER (40) OCCURS THROUGH THE DERIVATION CHANNEL (36), WITH WHICH THE WORK PRESSURE PUSHES THE CRAZY PISTON (32) AGAINST THE SPRING (41), AWAY FROM HIS CLOSURE EDGE (34) ). WORK PRESSURE CAN THEN FALL BETWEEN THE PRESSURE CAMERA (37) AND THE PRESSURE CAMERA (38) UNTIL THE SPRING (41) SEALS THE CRAZY PISTON (33) AGAINST THE CLOSING EDGE (34). THE PRESSURE THAT IS REGULATED IN THE PRESSURE CHAMBER (37) HOLDS THE WORK PISTON (31), TOGETHER WITH THE CRAZY PISTON (32, 33) IN THE FINAL POSITION. HOWEVER, THE PRESSURE ADJUSTED IS FOUND BELOW ITS MAXIMUM VALUE.

ES97951167T 1996-11-16 1997-11-11 PNEUMATIC OR HYDRAULIC SERVOMOTOR WITH DISCONNECTION DEVICE. Expired - Lifetime ES2170424T3 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19647472A DE19647472A1 (en) 1996-11-16 1996-11-16 Pneumatic or hydraulic servomotor with a shutdown device

Publications (1)

Publication Number Publication Date
ES2170424T3 true ES2170424T3 (en) 2002-08-01

Family

ID=7811878

Family Applications (1)

Application Number Title Priority Date Filing Date
ES97951167T Expired - Lifetime ES2170424T3 (en) 1996-11-16 1997-11-11 PNEUMATIC OR HYDRAULIC SERVOMOTOR WITH DISCONNECTION DEVICE.

Country Status (8)

Country Link
US (1) US6161465A (en)
EP (1) EP0937206B1 (en)
JP (1) JP2001504059A (en)
KR (1) KR100643421B1 (en)
CN (1) CN1096578C (en)
DE (2) DE19647472A1 (en)
ES (1) ES2170424T3 (en)
WO (1) WO1998022718A1 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19903511A1 (en) * 1999-01-29 2000-08-03 Zahnradfabrik Friedrichshafen Setting motor with switching-off device, with at least one compression spring between free piston and working piston
US6787531B1 (en) * 1999-08-31 2004-09-07 Schering Ag Pharmaceutical composition for use as a contraceptive
DE19947510A1 (en) * 1999-10-01 2001-04-05 Mercedes Benz Lenkungen Gmbh Toothed rack linkage for motor vehicles comprises a steering housing, at least one toothed rod, and a connection rod guide.
DE10209370B4 (en) * 2002-03-02 2009-01-15 Zf Lenksysteme Gmbh Power steering for motor vehicles
DE102005019577A1 (en) * 2005-04-27 2006-11-09 Zf Lenksysteme Gmbh Servo motor for motor vehicle, has piston locking bypass connection between work positions, in normal pressure condition, where piston axially moves to piston rod during reaching of defined pressure in work spaces, and releases connection
DE102005050798B4 (en) 2005-10-24 2022-01-13 Robert Bosch Gmbh Steering device for a motor vehicle
DE102007019906A1 (en) * 2007-04-27 2009-04-30 Zf Lenksysteme Gmbh Power steering device for a vehicle
DE102007000680A1 (en) 2007-11-12 2009-05-14 Zf Lenksysteme Gmbh Steering device for vehicle, has steering housing, in which steering bar is arranged displaceable, and steering bar is connected on its ends by joints and tie rods with steering wheels
DE102008000761A1 (en) 2008-03-19 2009-09-24 Zf Lenksysteme Gmbh Steering device i.e. toothed rod electro-steering device, for use in motor vehicle, has steering bar relocatably arranged in steering housing, where locating surface of bar is arranged at distance from ends of bar around steering stroke
JP5444826B2 (en) * 2009-05-08 2014-03-19 トヨタ自動車株式会社 Hydraulic actuator for vehicle
CN103434563A (en) * 2013-09-03 2013-12-11 苏州巴吉赛车科技有限公司 Split racer steering gear hydraulic cylinder piston device
CN105292241A (en) * 2015-11-20 2016-02-03 湖北汽车工业学院 Automobile rear wheel steering hydraulic alignment cylinder and use method thereof
WO2018222845A1 (en) * 2017-05-31 2018-12-06 R.H. Sheppard Co., Inc. Plunger assembly for a power steering system
DE202020004533U1 (en) 2020-10-28 2022-02-04 Bümach Engineering International B.V. End position cushioned working cylinder

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2703558A (en) * 1951-08-30 1955-03-08 Modern Products Inc Pressure return cylinder and piston unit
US2735502A (en) * 1952-10-17 1956-02-21 Hydraulic power steering with valved
FR1125999A (en) * 1955-05-04 1956-11-12 Offray & Cie Device forming automatic pressure limiter and reducer by producing the end-of-stroke stop, for double-acting hydraulic cylinders
US2895455A (en) * 1958-04-10 1959-07-21 Shakespeare Products Co Vacuum control and motor
US3568570A (en) * 1969-03-05 1971-03-09 Diamond Power Speciality Anticreep hydraulic positioning system
US3654834A (en) * 1970-05-27 1972-04-11 Cascade Corp Fluid bypass valve
DE3013381C2 (en) * 1980-04-05 1986-07-17 Zahnradfabrik Friedrichshafen Ag, 7990 Friedrichshafen Working piston-cylinder unit
DE3534577C2 (en) * 1985-09-27 1993-11-18 Atsugi Motor Parts Co Ltd Hydraulic rack and pinion steering
US4860646A (en) * 1987-02-10 1989-08-29 Marathon Corporation Compactor with hydraulic dwell and method
DE3923512A1 (en) * 1989-07-15 1991-01-24 Stabilus Gmbh SHOCK VALVE WITH STRONG PROGRESSIVE STEEL CHARACTERISTICS, ESPECIALLY FOR STEERING DAMPERS FOR MOTORCYCLES
DE4003047A1 (en) * 1990-02-02 1991-08-08 Audi Ag Power assisted steering system - has servo-piston mounted on retaining ring with radial gap
DE9111009U1 (en) * 1991-09-05 1993-01-14 Hydraulik Techniek, Emmen Hydraulic cylinder
DE4139085A1 (en) * 1991-11-28 1993-06-03 Bosch Gmbh Robert HYDRAULIC AUXILIARY STEERING DEVICE FOR MOTOR VEHICLES
DE4221459A1 (en) * 1992-06-30 1994-01-05 Teves Gmbh Alfred Hydraulic servo steering with overload protection - has direct connection between pressure-charged working chamber and pressure connection of other working chamber

Also Published As

Publication number Publication date
DE59703872D1 (en) 2001-07-26
CN1096578C (en) 2002-12-18
EP0937206B1 (en) 2001-06-20
EP0937206A1 (en) 1999-08-25
US6161465A (en) 2000-12-19
KR100643421B1 (en) 2006-11-13
DE19647472A1 (en) 1998-05-20
CN1234098A (en) 1999-11-03
JP2001504059A (en) 2001-03-27
WO1998022718A1 (en) 1998-05-28
KR20000053334A (en) 2000-08-25

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